diff --git a/packages/SystemUI/src/com/android/systemui/navigationbar/gestural/Utilities.java b/packages/SystemUI/src/com/android/systemui/navigationbar/gestural/Utilities.java
index 335172e..30d2d7a 100644
--- a/packages/SystemUI/src/com/android/systemui/navigationbar/gestural/Utilities.java
+++ b/packages/SystemUI/src/com/android/systemui/navigationbar/gestural/Utilities.java
@@ -16,7 +16,7 @@
 
 package com.android.systemui.navigationbar.gestural;
 
-import static android.view.InputDevice.SOURCE_TOUCHSCREEN;
+import static android.view.MotionEvent.CLASSIFICATION_MULTI_FINGER_SWIPE;
 
 import android.content.Context;
 import android.view.MotionEvent;
@@ -24,14 +24,12 @@
 
 public final class Utilities {
 
-    private static final int TRACKPAD_GESTURE_SCALE = 60;
+    private static final int TRACKPAD_GESTURE_SCALE = 200;
 
     public static boolean isTrackpadMotionEvent(boolean isTrackpadGestureBackEnabled,
             MotionEvent event) {
-        // TODO: ideally should use event.getClassification(), but currently only the move
-        // events get assigned the correct classification.
         return isTrackpadGestureBackEnabled
-                && (event.getSource() & SOURCE_TOUCHSCREEN) != SOURCE_TOUCHSCREEN;
+                && event.getClassification() == CLASSIFICATION_MULTI_FINGER_SWIPE;
     }
 
     public static int getTrackpadScale(Context context) {
diff --git a/packages/SystemUI/tests/src/com/android/systemui/navigationbar/gestural/MotionEventsHandlerTest.java b/packages/SystemUI/tests/src/com/android/systemui/navigationbar/gestural/MotionEventsHandlerTest.java
index 509d5f0..70ba306 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/navigationbar/gestural/MotionEventsHandlerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/navigationbar/gestural/MotionEventsHandlerTest.java
@@ -16,10 +16,10 @@
 
 package com.android.systemui.navigationbar.gestural;
 
-import static android.view.InputDevice.SOURCE_TOUCHPAD;
-import static android.view.InputDevice.SOURCE_TOUCHSCREEN;
+import static android.view.InputDevice.SOURCE_MOUSE;
 import static android.view.MotionEvent.AXIS_GESTURE_X_OFFSET;
 import static android.view.MotionEvent.AXIS_GESTURE_Y_OFFSET;
+import static android.view.MotionEvent.CLASSIFICATION_MULTI_FINGER_SWIPE;
 
 import static com.google.common.truth.Truth.assertThat;
 
@@ -57,14 +57,9 @@
     @Test
     public void onTouchEvent_touchScreen_hasCorrectDisplacements() {
         MotionEvent down = MotionEvent.obtain(0, 0, MotionEvent.ACTION_DOWN, 100, 100, 0);
-        // TODO: change to use classification after gesture library is ported.
-        down.setSource(SOURCE_TOUCHSCREEN);
         MotionEvent move1 = MotionEvent.obtain(0, 1, MotionEvent.ACTION_MOVE, 150, 125, 0);
-        move1.setSource(SOURCE_TOUCHSCREEN);
         MotionEvent move2 = MotionEvent.obtain(0, 2, MotionEvent.ACTION_MOVE, 200, 150, 0);
-        move2.setSource(SOURCE_TOUCHSCREEN);
         MotionEvent up = MotionEvent.obtain(0, 3, MotionEvent.ACTION_UP, 250, 175, 0);
-        up.setSource(SOURCE_TOUCHSCREEN);
 
         mMotionEventsHandler.onMotionEvent(down);
         mMotionEventsHandler.onMotionEvent(move1);
@@ -90,8 +85,8 @@
         downPointerProperties[0].id = 1;
         downPointerProperties[0].toolType = MotionEvent.TOOL_TYPE_FINGER;
         MotionEvent down = MotionEvent.obtain(0, 0, MotionEvent.ACTION_DOWN, 1,
-                downPointerProperties, downPointerCoords, 0, 0, 1.0f, 1.0f, 0, 0,
-                SOURCE_TOUCHPAD, 0);
+                downPointerProperties, downPointerCoords, 0, 0, 1.0f, 1.0f, 0, 0, SOURCE_MOUSE,
+                0, 0, CLASSIFICATION_MULTI_FINGER_SWIPE);
 
         MotionEvent.PointerCoords[] movePointerCoords1 = new MotionEvent.PointerCoords[1];
         movePointerCoords1[0] = new MotionEvent.PointerCoords();
@@ -103,8 +98,8 @@
         movePointerProperties1[0].id = 1;
         movePointerProperties1[0].toolType = MotionEvent.TOOL_TYPE_FINGER;
         MotionEvent move1 = MotionEvent.obtain(0, 1, MotionEvent.ACTION_MOVE, 1,
-                movePointerProperties1, movePointerCoords1, 0, 0, 1.0f, 1.0f, 0, 0, SOURCE_TOUCHPAD,
-                0);
+                movePointerProperties1, movePointerCoords1, 0, 0, 1.0f, 1.0f, 0, 0, SOURCE_MOUSE,
+                0, 0, CLASSIFICATION_MULTI_FINGER_SWIPE);
 
         MotionEvent.PointerCoords[] movePointerCoords2 = new MotionEvent.PointerCoords[1];
         movePointerCoords2[0] = new MotionEvent.PointerCoords();
@@ -116,8 +111,8 @@
         movePointerProperties2[0].id = 1;
         movePointerProperties2[0].toolType = MotionEvent.TOOL_TYPE_FINGER;
         MotionEvent move2 = MotionEvent.obtain(0, 2, MotionEvent.ACTION_MOVE, 1,
-                movePointerProperties2, movePointerCoords2, 0, 0, 1.0f, 1.0f, 0, 0, SOURCE_TOUCHPAD,
-                0);
+                movePointerProperties2, movePointerCoords2, 0, 0, 1.0f, 1.0f, 0, 0, SOURCE_MOUSE,
+                0, 0, CLASSIFICATION_MULTI_FINGER_SWIPE);
 
         MotionEvent.PointerCoords[] upPointerCoords = new MotionEvent.PointerCoords[1];
         upPointerCoords[0] = new MotionEvent.PointerCoords();
@@ -129,7 +124,8 @@
         upPointerProperties2[0].id = 1;
         upPointerProperties2[0].toolType = MotionEvent.TOOL_TYPE_FINGER;
         MotionEvent up = MotionEvent.obtain(0, 2, MotionEvent.ACTION_UP, 1,
-                upPointerProperties2, upPointerCoords, 0, 0, 1.0f, 1.0f, 0, 0, SOURCE_TOUCHPAD, 0);
+                upPointerProperties2, upPointerCoords, 0, 0, 1.0f, 1.0f, 0, 0, SOURCE_MOUSE,
+                0, 0, CLASSIFICATION_MULTI_FINGER_SWIPE);
 
         mMotionEventsHandler.onMotionEvent(down);
         mMotionEventsHandler.onMotionEvent(move1);